In the refrigeration industry, it is divided into air-cooled chillers and water-cooled chillers. According to the compressor, it is divided into screw chillers, scroll chillers and centrifugal chillers. In terms of temperature control, it is divided into low-temperature industrial chillers and normal temperature chillers. The temperature of normal temperature chillers is generally controlled within the range of 0 ℃ -35 ℃. The temperature control of the low-temperature unit is generally about 0 ℃ to -100 ℃.

The chiller consists of four main components: compressor, evaporator, condenser and expansion valve, which realizes the refrigeration and heating effect of the unit.

Chillers are commonly known as chillers, refrigerators, ice water chillers, water chillers, chillers, etc. Because it is widely used in all walks of life, there are countless names. The steam compression chiller consists of four main components: compressor, evaporator, condenser and some metering devices. Different refrigerants are realized in the form of steam compression refrigeration cycle. Absorption chillers use water as refrigerant and rely on water and lithium bromide solution to achieve strong affinity for refrigeration effect. Water chillers are generally used in air conditioning units and industrial cooling. In air conditioning systems, chilled water is usually distributed to heat exchangers or coils in air handling units or other types of terminal equipment for cooling in their respective spaces, and then the cooling water is redistributed back to the condenser to be cooled. In industrial applications, chilled water or other liquid cooling pumps are through processes or laboratory equipment. Industrial chillers are used to control the cooling of products, mechanisms and factory machinery in all walks of life. Water chillers can generally be divided into water-cooled and air-cooled according to the refrigeration form. Technically, the energy efficiency ratio of water cooling is 300 to 500 kcal/h higher than that of air cooling; In terms of installation, water cooling can be used only when it is incorporated into the cooling tower, while air cooling is movable without other auxiliary equipment